Called when sidebar looses focus.

<div class="definition">
    blur([event])
</div>

<div class="arguments">
    <table>
    <tr>
        <td>event</td>
        <td><b>object</b>, DOM Event object</td>
    </tr>
    </table>
</div>

Returns <i>undefined</i>.

<h4>Description</h4>

This method is called when sidebar looses focus either by user clicking away with the mouse or using tab key. It is used internally, but you can use it to emulate
loosing focus. This method emits <a class="method" href="w2sidebar.onBlur">.onBlur</a> event.
<div style="height: 10px"></div>

If you have sidebar defined in the following way:
<textarea class="javascript">
let sidebar = new w2sidebar({
    name : 'sidebar',
    nodes: [
        { id: 'id-1', text: 'Level 1', hidden: true },
        { id: 'id-2', text: 'Level 2', expanded: true, nodes: [
            { id: 'id-2-1', text: 'Level 2.1' },
            { id: 'id-2-2', text: 'Level 2.2' }
        ]},
        { id: 'id-3', text: 'Level 3' }
    ]
});
</textarea>

You can click on the node:
<textarea class="javascript">
w2ui.sidebar.blur();
</textarea>
